| 张玉,张国军,裴毓,张文栋.乳腺超声断层成像系统的有限元仿真分析[J].,2021,40(2):243-248 |
| 乳腺超声断层成像系统的有限元仿真分析 |
| The finite element simulation analysis of breast ultrasound tomography system |
| 投稿时间：2020-06-09 修订日期：2021-03-01 |
| 中文摘要: |
| 本文利用有限元仿真软件COMSOL进行乳腺超声断层成像仿真，仿真模型置于水中，重建区域包含乳腺软组织和一个圆形铁块障碍物。256个换能器等角度环形分布于乳腺外部，采用一个换能器发射，其余所有换能器接收的方式进行，依次进行256次仿真来实现环形扫描。仿真得到随时间变化的二维声压分布云图，提取接收电压获得信号矩阵。利用等角扇束滤波反投影重建算法进行图像重建，仿真实验结果证明了换能器呈360°进行环形扫描的方式可行。 |
| 英文摘要: |
| In this paper, the finite element simulation software COMSOL is used to simulate breast ultrasound tomography. The simulation model is placed in water, and the reconstruction area contains breast soft tissue and a round iron block obstacle. 256 transducers are distributed in a circle at equal angles outside the mammary gland, using one transducer to transmit and all other transducers to receive, and performing 256 simulations in turn to achieve a circular scan. The simulation obtains a two-dimensional cloud map of sound pressure distribution with time, and extracts the received voltage to obtain a signal matrix. The image reconstruction is carried out by using the equal angle fan beam filter back projection reconstruction algorithm. The results of simulation experiments prove that the transducers are arranged in 360° and the method of circular scanning is feasible. |
| DOI：10.11684/j.issn.1000-310X.2021.02.010 |
| 中文关键词: COMSOL 仿真 超声断层成像 有限元 |
| 英文关键词: COMSOL simulation ultrasound tomography finite element |
| 基金项目:国家自然科学基金项目（重大项目）（61927807),国家重点基础研究发展计划（973计划）(2019YFC0119800)，山西省重点研发计划项目（201803D121089），山西省研究生教育创新项目(2019BY109)，山西省“1331”工程重点学科建设基金项目 |
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